The Finder provides a way for the user to browse the Water Bucket library and identify resources that are catalogued in accordance with the Controlled Subject Index. When a resource is added to the library, it may be classified under one or more of five categories, namely: Education and Outreach, Issues, Location, Organizations, and Tools & Resources. Each category has a number of sub-categories. The Finder cross-references existing resources by region, sector, and watershed function.